Eyelash Lift Pad with Pre-Applied Polyurethane Adhesive
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Solution Overview
Problem
Existing eyelash enhancement methods, such as eyelash extensions and curlers, require manual application of adhesives, which can be cumbersome and inconvenient for users.
Innovation Solution
An eyelash lift pad with pre-applied adhesive surfaces on both the eyelid-facing and lash-facing surfaces, allowing for easy and secure attachment to the eyelid and eyelashes without the need for additional glue, manufactured using a polyurethane adhesive process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual application of adhesives is used for eyelash enhancement, then the application process requires user skill and effort, but the process becomes cumbersome and inconvenient
Solution Approach 1:
The adhesive is pre-applied to the lift pad during manufacturing, eliminating the need for users to manually apply adhesive. This preliminary action resolves the contradiction by making the application process convenient while maintaining the necessary adhesive function.
Solution Approach 2:
The lift pad is designed to be self-adhesive, serving its own adhesive needs without requiring external adhesive application by the user. This self-service approach simplifies the application process while ensuring proper adhesion.
2Ease of operation
If adhesive is pre-applied during manufacturing, then user application becomes simple and convenient, but the manufacturing process becomes more complex
Solution Approach 1:
The manufacturing process merges the adhesive application step with the lift pad fabrication process. By integrating these operations, the patent achieves pre-applied adhesive functionality while managing manufacturing complexity through process consolidation rather than adding separate independent steps.
Solution Approach 2:
The patent utilizes changes in adhesive parameters (viscosity, curing characteristics) to enable effective pre-application during manufacturing. By optimizing these parameters, the adhesive can be applied in a controlled manner during the molding process, balancing manufacturing feasibility with end-user convenience.
3Strength
If polyurethane adhesive is used, then strong bonding is achieved, but the adhesive requires controlled application to prevent excess
Solution Approach 1:
The adhesive is applied with specific local quality characteristics - controlled viscosity and targeted placement in the mold cavity. This ensures strong bonding where needed while preventing excess adhesive from causing manufacturing issues, resolving the contradiction between bond strength and application precision.
Solution Approach 2:
The patent employs composite material approaches by combining the polyurethane adhesive with the lift pad substrate material. This integration ensures proper adhesive distribution and bonding strength while managing the precision requirements through material compatibility and process integration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates easy and secure application of the eyelash lift pad to the eyelid and eyelashes, eliminating the need for user-applied adhesives and enabling convenient curling and lifting of eyelashes with reusable and disposable options.
Implementation Method 1
a polyurethane adhesive process
Data Source
Figure 1A~1B
Figure 2~3
Figure 4
AI summary
An eyelash lift pad includes an adhesive body having at least one exposed adhesive surface. The adhesive body is formed during manufacturing of the eyelash lift pad and prior to packaging of the eyelash lift pad.